Issue: The category is not working when installing the extension http://prntscr.com/n2g47f

Solution: 

Could you please check if you have changed Catalog price scope to store view: Store > Configuration > Catalog > Catalog > Price > Catalog Price Scope http://prntscr.com/lt0uw4 ?

If there are any issue, please feel free to contact us. We're always pleased to support you. 

FYI, this issue would be resolved totally from v2.1.8